package com.wang.app.gateway.filter;

import com.wang.util.AppJwtUtil;
import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.util.StringUtils;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

/**
 * App端网关过滤配置
 *
 * @author: wangning
 * @date: 2023/12/26 17:35
 */
@Component
@Slf4j
public class AuthFilter implements Ordered, GlobalFilter {
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {

        ServerHttpRequest request = exchange.getRequest();
        ServerHttpResponse response = exchange.getResponse();

        if (request.getURI().getPath().contains("/login")) {
            return chain.filter(exchange);
        }

        String token = request.getHeaders().getFirst("token");
        //是否存在
        if (StringUtils.isEmpty(token)){
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }
        //是否有效
        Claims claims = AppJwtUtil.getClaimsBody(token);
        //是否过期
        int result = AppJwtUtil.verifyToken(claims);
        if (result == 1 || result == 2){
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }
        return chain.filter(exchange);
    }

    @Override
    public int getOrder() {
        return 0;
    }
}
